package com.sun.showcase.utils;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
@Component
public class SpringApplicationContextHolder implements ApplicationContextAware {
	private static ApplicationContext applicationContext;

	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		SpringApplicationContextHolder.applicationContext = applicationContext;
	}

	// 获取applicationContext
	public static ApplicationContext getApplicationContext() {
	    return applicationContext;
	}

	// 通过name获取 Bean.
	public static Object getBean(String name) {
	    return getApplicationContext().getBean(name);
	}

	// 通过class获取Bean.
	public static <T> T getBean(Class<T> clazz) {
	    return getApplicationContext().getBean(clazz);
	}

	// 通过name,以及Clazz返回指定的Bean
	public static <T> T getBean(String name, Class<T> clazz) {
	    return getApplicationContext().getBean(name, clazz);
	}
}
